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Norma-Jean [14]
3 years ago
12

Factorise completely a). 3xy - 9x b). x² - 4 c). 2x² + 5y + 1​

Mathematics
1 answer:
Keith_Richards [23]3 years ago
8 0

Answer:

a) 3x(y-3)

b) (x-2)(X+2)

Step-by-step explanation:

See the steps below:) You can also use the app photo math, you take a picture and it will give you the answer and explain the steps:)

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c.

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Answer:

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Step-by-step explanation:

Thats what I got from this question

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Which is the greatest common factor of 16 and 40? <br><br> A- 4 <br> B- 8 <br> C- 40 <br> D- 80
andrey2020 [161]
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3 years ago
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How do you factor #8x^3+4x^2-18x-9#?
kvasek [131]
This expression is a good candidate for "factoring by grouping."  I note that the first 2 terms and the last 2 terms share a common factor, 2x+1:

8x^3 + 4x^2                 - 18x - 9
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This can be re-written as (2x+1)(4x2-9)

The latter factor is also easily factorable:

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6 0
4 years ago
Sarah ran 2 miles and Jaime ran 15, 840 feet. How many miles did they run together? (The conversion factor is 5280 feet/mile.)
Korvikt [17]

Answer:

C. 5 miles

Step-by-step explanation:

Since we need to find how many miles they ran together, let us convert feet to miles. Sarah's length is already in miles so we'll leave it that way.

Jaime ran 15840 feet. We are given how many feet are there in one mile (5280), so we need to find how many miles are there in 15840 feet.

x = 15840 / 5280 = 3 miles.

So, Jaime ran 3 miles and Sarah ran 2 miles.

That means that together they ran 3 + 2 = 5 miles.

6 0
4 years ago
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